Worst-case flutter margins may be computed for a linear model with respect to a set of uncertainty operators using the structured singular value. This paper considers an on-line implementation to compute these robust margins in a flight test program. Uncertainty descriptions are updated at test points to account for unmodeled time-varying dynamics of the airplane by ensuring the robust model is not invalidated by measured flight data. Robust margins computed with respect to this uncertainty remain conservative to the changing dynamics throughout the flight. A simulation clearly demonstrates this method can improve the efficiency of flight testing by accurately predicting the flutter margin to improve safety while reducing the necessary flight time.
Worst-Case Approach for On-Line Flutter Prediction
1998
8 pages
Report
No indication
English
A Worst-Case Approach for On-Line Flutter Prediction
NTRS | 1998
|ENGINEERING NOTES - Application of Pattern Search in Worst-Case Flutter Solution
Online Contents | 2012
|